I've heard a lot of good things about Seagate. I haven't used them myself although my father uses them for his PC and his data storage is absolutely critical to his work. I've had great experiences with Western Digital though. All my drives are Western Digital and I haven't had any issues at all except for one drive that was about five years old and finally kicked the bucket. Otherwise I've been very happy.
I've known people to have issues with Maxtor drives though. It's a coin toss there - some have issues and others don't. I've known enough people with Maxtor problems though so I use Western Digital instead.
And Neutrino's right - I'd try SpinRight from GRC.com. The guy that runs that site is awesome and really knows what he's doing.
